RBAC (Role-Based Access Control)
A method of regulating access to computer or network resources based on the roles of individual users
RBAC is a security mechanism that restricts access based on the roles assigned to users or service accounts. It lets you define fine-grained permissions for who can do what in your cluster.
Kubernetes RBAC has four main objects: Role (permissions within a namespace), ClusterRole (permissions cluster-wide), RoleBinding (grants a Role to users/service accounts in a namespace), and ClusterRoleBinding (grants a ClusterRole across the entire cluster).
From a security standpoint, follow the principle of least privilege. Don’t give more permissions than needed. Regularly audit your RBAC configurations, use dedicated service accounts with minimal permissions, and clean up unused bindings.